JPH0792523B2 - Glass lens - Google Patents
Glass lensInfo
- Publication number
- JPH0792523B2 JPH0792523B2 JP63312659A JP31265988A JPH0792523B2 JP H0792523 B2 JPH0792523 B2 JP H0792523B2 JP 63312659 A JP63312659 A JP 63312659A JP 31265988 A JP31265988 A JP 31265988A JP H0792523 B2 JPH0792523 B2 JP H0792523B2
- Authority
- JP
- Japan
- Prior art keywords
- glass lens
- peripheral wall
- line
- front surface
- wall portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/10—Construction of plunger or mould for making hollow or semi-hollow articles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/40—Product characteristics
- C03B2215/41—Profiled surfaces
- C03B2215/412—Profiled surfaces fine structured, e.g. fresnel lenses, prismatic reflectors, other sharp-edged surface profiles
Description
【発明の詳細な説明】 本発明ガラス製レンズを以下の項目に従って詳細に説明
する。DETAILED DESCRIPTION OF THE INVENTION The glass lens of the present invention will be described in detail according to the following items.
A.産業上の利用分野 B.発明の概要 C.従来技術 D.発明が解決しようとする課題 E.課題を解決するための手段 F.実施例［第１図乃至第５図］ G.発明の効果 （A.産業上の利用分野） 本発明は新規なガラス製レンズに関する。詳しくは、型
成形時のパーティングラインを工夫することにより、前
面部に大きな曲面がある場合でも前面から後端までの距
離を全周に亘って略一様にすることができ、これによっ
て形成性を良くして歩留りを向上させることができる新
規なガラス製レンズを提供しようとするものである。A. Industrial fields of use B. Outline of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems F. Embodiments [FIGS. 1 to 5] G. Invention (A. Field of Industrial Application) The present invention relates to a novel glass lens. In detail, by devising the parting line during molding, the distance from the front surface to the rear end can be made almost uniform over the entire circumference even if there is a large curved surface on the front surface. An object of the present invention is to provide a novel glass lens that improves the yield and improves the yield.
（B.発明の概要） 本発明ガラス製レンズは、曲面に形成された前面部と該
前面部の周縁から略後方へ向って延びる周壁部とが一体
に形成され、周壁部の後端部に位置した型成形上のパー
ティングラインが１の接合線を挟んで反対側に位置する
と共に該接合線で接合される異なる２つの平面上に位置
するようにすることによって、前面部の曲面に対応させ
て上記２つの平面を傾斜させて周壁部の高さを全周に亘
って略一様に近くなるようにすることができ、これによ
って成形性を向上させることができる。(B. Outline of the Invention) In the glass lens of the present invention, a front surface portion formed in a curved surface and a peripheral wall portion extending substantially rearward from a peripheral edge of the front surface portion are integrally formed, and a rear end portion of the peripheral wall portion is formed. Corresponding to the curved surface of the front part by making the positioned parting line on the mold forming on the opposite side across the joining line 1 and on two different planes joined by the joining line Then, the two planes can be inclined so that the height of the peripheral wall portion becomes substantially uniform over the entire circumference, whereby the formability can be improved.
（C.従来技術） 前面部と該前面部の周縁から略後方へ向って延びる周壁
部とが一体に形成されたタイプのガラス製レンズの従来
のものは、周壁部の後端部に位置した型成形上のパーテ
ィングラインが一の平面上に位置しているものであっ
た。(C. Prior Art) A conventional glass lens of a type in which a front surface portion and a peripheral wall portion extending substantially rearward from a peripheral edge of the front surface portion are integrally formed is located at a rear end portion of the peripheral wall portion. The parting line for molding was located on one plane.
そして、ガラス製レンズの型成形は、下型に形成された
凹部内の中央部にゴブ状の熔融ガラスを入れておき、そ
こに上型に形成された凸部を嵌合して行くと、凸部の凹
部内への嵌入につれて上記熔融ガラスが引き延ばされて
行き、最終的に、該熔融ガラスが下型の凹部と上型の凸
部との間に出来るキャビティ内に充たされ、これを冷却
してから下型と上型を引き離すことによって為される。
そして、上記熔融ガラスがキャビティ内に行き亘る過程
は、先ず下方に位置した前面部形成用のキャビティ内を
広がって行き、そして、前面部用キャビティの端縁に行
きついたところから略上方に延びている周壁部用キャビ
ティを上へ上がって行き、最終的にキャビティ全体に行
亘ることになる。Then, in the molding of the glass lens, when a gob-shaped molten glass is put in the center of the concave portion formed in the lower mold, and the convex portion formed in the upper mold is fitted therein, The molten glass is stretched as it fits into the concave portion of the convex portion, and finally, the molten glass is filled in the cavity formed between the concave portion of the lower mold and the convex portion of the upper mold, This is done by cooling and then separating the lower mold and the upper mold.
In the process of the molten glass reaching the inside of the cavity, first, the molten glass spreads inside the cavity for forming the front portion located below, and then extends substantially upward from the point where it reaches the end edge of the cavity for the front portion. The cavity for the surrounding wall portion goes up, and finally reaches the entire cavity.
（D.発明が解決しようとする課題） ところで、従来のガラス製レンズにあっては、パーティ
ングラインが一の平面内にあるため、前面部に大きな曲
面があったりすると、前面部のうち前方へ大きく突出し
ている部分に対応した周壁部の高さが大きくなり、逆
に、前面部のうち後方へ引っ込んでいる部分に対応した
周壁部の高さが小さくなり、これらによって、周壁部の
高さがその部分部分によって大きく異なることになる。
特に、第６図に示すように、スラント角の大きいレンズ
ａにおいては、ｂ部とｃ部とで著しい差が生じてしま
う。(D. Problem to be Solved by the Invention) By the way, in the conventional glass lens, since the parting line is in one plane, if the front surface has a large curved surface, the front part The height of the peripheral wall part corresponding to the part that largely protrudes to the front side becomes large, and conversely, the height of the peripheral wall part corresponding to the part of the front part that retracts rearward becomes small. However, it depends on the part.
In particular, as shown in FIG. 6, in the lens a having a large slant angle, a significant difference occurs between the b portion and the c portion.
すると、上記したように熔融ガラスがキャビティ内を拡
がっていく過程において、周壁部の高さの低いところで
は早い時期にそのキャビティに熔融ガラスが行き亘って
しまい、周壁部の高さが高いところでは、かなり遅れて
からキャビティに熔融ガラスが拡がって来るというよう
に、熔融ガラスの拡がりに極端な時間差が生じて来てし
まう。そして、熔融ガラスの拡がりに極端な時間差が生
じることは、熔融ガラスが早く来たところとそうでない
ところで熔融ガラスの冷却速度に大きな違いが出て来
て、これが複雑な応力が残留する原因となる等製品不良
が発生する率を高くするという問題がある。Then, in the process in which the molten glass spreads in the cavity as described above, the molten glass spreads into the cavity at an early stage at a location where the height of the peripheral wall is low, and at a location where the peripheral wall is high, However, there is an extreme time difference in the spread of the molten glass such that the molten glass spreads in the cavity after a considerable delay. Then, the occurrence of an extreme time difference in the spread of the molten glass causes a large difference in the cooling rate of the molten glass where the molten glass comes earlier and when it does not, which causes a complicated stress to remain. There is a problem of increasing the rate of occurrence of product defects.
（E.課題を解決するための手段） 本発明ガラス製レンズは、上記した課題を解決するため
に、曲面に形成された前面部と該前面部の周壁から略後
方へ向って延びる周壁部とが一体に形成され、周壁部の
後端部に位置した型成形上のパーティングラインが１を
接合線を挟んで反対側に位置すると共に該接合線で接合
される異なる２つの平面上に概略位置させるようにした
ものである。(E. Means for Solving the Problems) The glass lens of the present invention is, in order to solve the above problems, a front surface portion formed in a curved surface and a peripheral wall portion extending substantially rearward from a peripheral wall of the front surface portion. Are integrally formed, and the parting line on the molding located at the rear end of the peripheral wall is located on the opposite side across the joining line 1 and is roughly on two different planes joined by the joining line. It is designed to be located.
従って、本発明ガラス製レンズにあっては、前面部の曲
面に応じてパーティングラインが位置する２つの平面を
傾斜させてやることによって周壁部の高さをその全周に
亘って略一様にすることができ、従って、型成形時にお
ける熔融ガラスの拡がりが略一様となり、全体に亘って
略均質なガラス製レンズが形成され、また、製造歩留り
も良好となる。Therefore, in the glass lens of the present invention, the height of the peripheral wall portion is made substantially uniform over the entire circumference by inclining the two planes on which the parting lines are located according to the curved surface of the front surface portion. Therefore, the spread of the molten glass at the time of molding becomes substantially uniform, a substantially homogeneous glass lens is formed over the whole, and the manufacturing yield becomes good.
（F.実施例）［第１図乃至第５図］ 以下に、本発明ガラス製レンズを図示した実施例に従っ
て詳細に説明する。(F. Examples) [FIGS. 1 to 5] Hereinafter, the glass lens of the present invention will be described in detail according to the illustrated embodiments.
図中１が本発明に係るガラス製レンズである。In the figure, 1 is a glass lens according to the present invention.
２はガラス製レンズ１の前面部であり、大きな曲面を有
している。Reference numeral 2 denotes a front surface of the glass lens 1, which has a large curved surface.
３は上記前面部２の周壁部から略後方へ向って延びた周
壁部であり、その後端部に型成形上のパーティングライ
ン４、即ち、２つの型の接合基準面を規定するラインが
位置している。Reference numeral 3 denotes a peripheral wall portion extending substantially rearward from the peripheral wall portion of the front surface portion 2, and a parting line 4 for molding, that is, a line defining a joining reference surface of two molds is located at a rear end portion thereof. is doing.
パーティングライン４は略四辺形をしており、その４辺
のうち１の対角線５を挟んでそれぞれ反対側に位置する
２つづつの辺4a、4bと4c、4dはそれそぞれ異なる平面上
に位置している。即ち、辺4aと4bは一の平面6a上に位置
しており、辺4cと4dは別の平面6b上に位置しており、そ
して、平面6aと6bとは上記対角線５で角度を有して接合
されている。尚、この実施例では、パーティングライン
４の４つの角部4A、4B、4C、4Dのうち対角線５が交わる
各部4A、4Cが最も低い位置にあり、4B、4Dが最も高い位
置にある。従って、前面部２の曲面も上記対角線５に対
応した部分が最も突出した部分に近くなっている。The parting line 4 has a substantially quadrilateral shape, and two sides 4a, 4b and 4c, 4d located on the opposite sides of one of the four sides of the diagonal line 5 are on different planes. Is located in. That is, the sides 4a and 4b are located on one plane 6a, the sides 4c and 4d are located on another plane 6b, and the planes 6a and 6b form an angle with the diagonal line 5 described above. Are joined together. In this embodiment, among the four corners 4A, 4B, 4C and 4D of the parting line 4, the portions 4A and 4C where the diagonal lines 5 intersect are at the lowest position and 4B and 4D are at the highest position. Therefore, the curved surface of the front surface portion 2 is also close to the most protruded portion corresponding to the diagonal line 5.
しかして、上記平面6a、6bを前面部２の曲面に対応させ
て適宜に傾斜させることによって周壁部３の高さを全体
に亘って略一様とすることができる。Then, by appropriately inclining the flat surfaces 6a and 6b so as to correspond to the curved surface of the front surface portion 2, the height of the peripheral wall portion 3 can be made substantially uniform throughout.
従って、本発明ガラス製レンズ１の型成形に際しては熔
融ガラスがキャビティ内に平均に行き亘り、全体に比較
的均質なガラス製レンズを歩留り良く成形することがで
きる。Therefore, when the glass lens 1 of the present invention is molded, the molten glass is spread evenly in the cavity, and a relatively homogeneous glass lens can be molded with good yield.
（G.発明の効果） 以上に記載したところから明らかなように、本発明ガラ
ス製レンズは、曲面に形成された前面部と該前面部の周
縁から略後方へ向って延びる周壁部とが一体に形成され
たガラス製レンズであって、周壁部の後端部に型成形上
のパーティングラインが位置し、上記パーティングライ
ンを１の接合線を挟んで互いに反対側に位置すると共に
該接合線で接合される異なる２つの平面上に概略位置さ
せたことを特徴とする。(G. Effects of the Invention) As is apparent from the above description, the glass lens of the present invention has the front surface portion formed in the curved surface and the peripheral wall portion extending substantially rearward from the peripheral edge of the front surface portion integrally formed. And a parting line on the mold formed at the rear end of the peripheral wall, the parting line being located on the opposite side of the joining line and the joining line. It is characterized by being roughly positioned on two different planes joined by lines.
従って、本発明ガラス製レンズにあっては、前面部の曲
面に応じてパーティングラインが位置する２つの平面を
傾斜させてやることによって周壁部の高さをその全周に
亘って略一様にすることができ、従って、型成形時にお
ける熔融ガラスの拡がりが略一様となり、全体に亘って
略均質なガラス製レンズが形成され、また、製造歩留り
も良好となる。Therefore, in the glass lens of the present invention, the height of the peripheral wall portion is made substantially uniform over the entire circumference by inclining the two planes on which the parting lines are located according to the curved surface of the front surface portion. Therefore, the spread of the molten glass at the time of molding becomes substantially uniform, a substantially homogeneous glass lens is formed over the whole, and the manufacturing yield becomes good.
尚、上記した実施例において、接合線を四辺形を成すパ
ーティングラインの２つの対角を結んだ線としたが、本
発明における接合線がこのような対角線に限られること
を意味するものではなく、該接合線はパーティングライ
ンを全体として２つに分割する線であればどの部分を通
るものであっても良い。Although the joining line is a line connecting two diagonals of a parting line forming a quadrangle in the above-mentioned embodiment, it does not mean that the joining line in the present invention is limited to such a diagonal line. Instead, the joining line may pass through any part as long as it is a line that divides the parting line into two as a whole.
図面は本発明ガラス製レンズの実施の一例を示すもの
で、第１図は正面図、第２図は背面図、第３図は右側面
図、第４図は第２図のIV−IV線に沿う断面図、第５図は
第２図のＶ−Ｖ線に沿う断面図、第６図は従来の問題点
を示す斜視図である。 符号の説明 １……ガラス製レンズ、２……前面部、 ３……周壁部、 ４……パーティングライン、 ５……接合線、6a、6b……平面The drawings show an example of an embodiment of the glass lens of the present invention. Fig. 1 is a front view, Fig. 2 is a rear view, Fig. 3 is a right side view, and Fig. 4 is a IV-IV line in Fig. 2. FIG. 5 is a sectional view taken along line VV of FIG. 2, and FIG. 6 is a perspective view showing conventional problems. Explanation of symbols 1 ... Glass lens, 2 ... Front part, 3 ... Peripheral wall part, 4 ... Parting line, 5 ... Joining line, 6a, 6b ... Plane
Claims (1)
から略後方へ向って延びる周壁部とが一体に形成された
ガラス製レンズであって、 周壁部の後端部に形成形上のパーティングラインが位置
し、 上記パーティングラインを１の接合線で挟んで互いに反
対側に位置すると共に該接合線で接合される異なる２つ
の平面上に概略位置させた ことを特徴とするガラス製レンズ1. A glass lens integrally formed with a curved front surface portion and a peripheral wall portion extending substantially rearward from a peripheral edge of the front surface portion, wherein the glass lens is formed at a rear end portion of the peripheral wall portion. An upper parting line is located, the parting line is located on opposite sides of one joining line and is roughly located on two different planes joined by the joining line. Glass lens
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312659A JPH0792523B2 (en) | 1988-12-10 | 1988-12-10 | Glass lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312659A JPH0792523B2 (en) | 1988-12-10 | 1988-12-10 | Glass lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02157704A JPH02157704A (en) | 1990-06-18 |
| JPH0792523B2 true JPH0792523B2 (en) | 1995-10-09 |
Family
ID=18031877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63312659A Expired - Lifetime JPH0792523B2 (en) | 1988-12-10 | 1988-12-10 | Glass lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0792523B2 (en) |
-
1988
- 1988-12-10 JP JP63312659A patent/JPH0792523B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02157704A (en) | 1990-06-18 |
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